Open source · 2026

Connecting Captions

Live subtitles on a Mac. Translation stays on the machine. Each sentence appears when it is ready.

Korean · English · Thai · Japanese

Install

Unzip Connecting-Captions.zip and drag Connecting Captions to Applications. No Xcode.

Or install Connecting Captions with Homebrew. Trust the tap when asked.

brew tap chrisswimlee/connectingcaptions
brew trust chrisswimlee/connectingcaptions
brew install --cask connectingcaptions

Set I speak and Show as. Translate follows one into the other. The same language needs no download.
Open Theater and press Listen. A new Listen starts with an empty board. A sentence appears when it is ready.
A whole-screen share includes Theater. Share the slides window when viewers should not see the captions.
Translation uses Apple’s on-device Translation. Voice stays on the Mac unless a cloud model is turned on.

macOS 15 or later. Theater streaming needs Apple Silicon.
Microphone for Listen. Accessibility only if a translation is typed into another app.
A language pack downloads once when I speak and Show as differ.

The free zip is for people. Firms that need a named license, a security contact, or an SLA should buy a commercial license.

How does this monetize? A named license, and support if you want it. Transcripts, voiceprints, and training data are not part of the sale.
Does voice leave this Mac? It stays on the Mac unless someone turns on a cloud speech model. Theater doesn’t send anything home.
Who fixes a break? Security reports get a reply within 7 days. A paid license can add a written SLA.